CrystalMethod: Please PM me all of the sticker information on the back of your LCDs. I might be able to find some more information for you. Building an LCD controller would be a huge engineering feat because it's converting an analog signal back into a digital one.
Okay, first I have to step back and take a deep breatch because I'm about to answer EVERYBODY'S QUESTIONS at the same time...
Here goes
1. LCDs below 9" in size are not likely to draw any resolutions past 320 x 240.
2. Most LCD screens under 10" are used for video. Here are two ways you could use one as a second display.
a. I HATE TV-out, but it's fairly cheap to buy a PCI video card with TV-out. And you'll only be drawing 2D on your secondary display anyways.
b. IF your video card has dual-display support and the second is a DVI connector, you need to find buy a DVI receiver. LCD screens run on a pure digital signal which DVI supplies. the DVI receiver simply feeds the right frequency to the right cables. If you're careful this can be the least expensive solution.
c. In order to use them with via a video card supports dual-display all you need is a scan convertor. It will resample and convert VGA to RCA or S-Video. PCStop.com sells the TVator for $73, which can draw 1024 x 768 (if your display can handle that).
3. LCD controllers are platform specific and LCDs come with one of 10 different connections. The only three cable standards are LVDS, TMDS, and 20-pin MDR. SO, if you get a controller you'll have to find an LCD with the same connection and vice-versa.
4. LCD controller video cards are currently very hard to find and/or purchase. There are several for sale on ebay, but they do not include the cables and only support displays with LVDS connectors. The majority of these video cards are ATI RAGE LT based and AGP. Any other available chipsets have deplorable drivers.
5. Schematics can usually be obtained by calling the company that made it or finding a spec sheet on a controller that has the same connection type.
PHEW!!
Anymore questions?